The main purpose of data classification in information security is to categorize data based on its sensitivity and importance. This process helps organizations identify which data requires the highest level of protection and determines appropriate security measures and access controls. Effective data classification allows companies to manage compliance with regulations, such as GDPR or HIPAA, and reduces the risk of data breaches. By establishing a clear data classification scheme, organizations can streamline their security efforts, ensuring that critical assets are safeguarded while also enhancing overall data governance.